ML20206B424

Forwards Insp Repts 50-361/99-03 & 50-362/99-03 on 990205-0312.One Violation Occurred & Being Treated as non-cited Violation,Consistent with App C of NRC Enforcement Policy

ML20206B424
Person / Time
Site:	San Onofre
Issue date:	04/20/1999
From:	Laura Smith NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:	Ray H SOUTHERN CALIFORNIA EDISON CO.
Shared Package
ML20206B427	List: IR 05000361/1999003 ML20206B424
References
50-361-99-03, 50-361-99-3, 50-362-99-03, 50-362-99-3, NUDOCS 9904290241
Download: ML20206B424 (5)

See also: IR 05000361/1999003

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April 20,1999

Harold B. Ray, Executive Vice President i

Southern California Edison Co. I

San Onofre Nuclear Generating Station

P.O. Box 128

San Clemente, California 92674-0128 '

SUBJECT: NRC INSPECTION REPORT NO. 50-361/99-03; 50-362/99-03

Dear Mr. Ray:

This refers to the special inspection conducted on February 5 through March 12,1999, at the

San Onofre Nuclear Generating Station, Units 2 and 3, facility, in response to a loss of

shutdown cooling event that occurred in Unit 2 on February 1,1999. The enclosed report

presents the results of this inspection.

Basad on the results of this inspection, the NRC has determined that one violation of NRC

requirements occurred. This violation is being treated as a noncited violation (NCV), consistent

with Appendix C of the NRC Enforcement Policy. The NCV is described in the subject i

inspection report. If you contest the violation or severity level of the NCV, you should provide a

response within 30 days of the date of this inspection report, with the basis for your denial, to

the Nuclear Regulatory Commission, ATTN: Document Control Desk, Washington,

DC 20555-0001, with copies to the Regional Administrator, Region IV, the NRC Resident

inspector at the facility that is the subject of this report, and the Director, Office of Enforcement,

United States Nuclear Regulatory Commission, Washington, DC 20555-0001.

Once the loss of shutdown cooling event occurred, the response of your Operations staff to

mitigate the effects of the loss was excellent and your defense-in-depth program successfully

ensured all safety functions were maintained. However, the event was the direct result of your

staff failing to recognize that the risk, which was associated with racking out a safety bus feeder

breAct, increased substantially when breaker interference was identified. More careful

planing and control was warranted, when the risk increased. Two significant opportunities to

intervene and prevent the loss of shutdown cooling event were missed. We agree with the

conclusions of your Level 1 event report, which documents your investigation of the causes of

the event. In addition, we find that your p!anned and completed corrective actions for the

violation, and for other weaknesses identified as a result of the event, were directed toward

improvement of your programs, procedures, and safety culture.

9904290241 990420

PDR ADOCK 05000361

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Southern California Edison Co. -2-

In accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter and its

enclosure will be placed in the NRC Public Document Room.

Should you have any questions concerning this inspection, we will be pleased to discuss them

with you.

Sincerely,

V

Linda Joy Smi , Chief

Project Branch E,

Division of Reactor Projects

Docket Nos.: 50-361

'

50-362

License Nos.: NPF-10

NPF-15

Enclosure:

NRC Inspection Report No.

50-361/99-03; 50-36?J99-03

cc w/ enclosure:

Chairman, Board of Supervisors

County of San Diego

1600 Pacific Highway, Room 335

San Diego, California 92101

Alan R. Watts, Esq.

Woodruff, Spradlin & Smart

701 S. Parker St. Suite 7000

Orange, California 92868-4720

Sherwin Harris, Resource Project Manager

Public Utilities Department

City of Riverside

3900 Main Street

~ Riverside, California 92522

R. W. Krieger, Vice President

Southern California Edison Company

San Onofre Nuclear Generating Station

P.O. Box 128

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San Clemente, California 92674-0128

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t Southern California Edison Co. -3-

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Stephen A. Woods, Senior Health Physicist

Division of Drinking Watet and

- Environmental Management

Nuclear Emergency Response Program

l Califomia Department of Health Services

l P.O. Box 942732, M/S 596

l' Sacramento, Califomia 94334-7320.

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Mr. Michael R. Olson .

,

Sr. Energy Administrafor

i San Diego Gas & Electric Company ,

I P. O. Box 1831 i

l San Diego, Califomia 92112-4150

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1 _ Mr. Steve Hsu

Radiological Health Branch '

State Department of Health Services

' P.O. Box 942732

Sacramento, Calife.rnia' 94234

Mayor

C'ty of San Clemente

100 Avenida Pret; idio

San Clemente, Califomia 92672

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l' Mr. Truman Buras\Mr. Robert Kinosian

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Califomia Public Utilities Commission

505 Van Ness, Rm. 4102

San Francisco, Califomia 94102

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